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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '055126c6791456e129454bfa90e3a5fac14c0071b503ec0d7cffe8dd885181fd' 
  AND token = 'H1eBUQNqp4DwRJgZ3OMrrOMfoXiaFllNIB0/3i4lcuo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}